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H-M Supporter - Gold Member

Need a copy of the wiring diagram for the forward/reverse switch. Lost my book, Grizzly has had 3 totally different type switches since 1999.
I'm in the process of installing a good USA made rotary drum switch on my 4003. It's a1999 model I bought brand new. Geez, I can't believe how cheaply made some of the components on this lathe are. Didn't their parents teach them that if something is worth doing, it's worth doing right. ????

H-M Supporter - Gold Member

Grizzly doesn't save obsolete stuff, then they try to sell ya stuff that is "upgraded" from the newer model. But the stuff rarely fits with machine work to it. Hope ya can find teh diagram. My lathe is down until I get the wiring diagram to install a switch

Active Member

I think I have a 2000 G4003 ( I am not sure how to find exact year, I bought it used), my manual doesn't have any wiring diagrams, but the online PDF does have detailed wiring diagrams. I am not sure how much the wiring has changed even if the switch did.

H-M Supporter - Gold Member

I think I have a 2000 G4003 ( I am not sure how to find exact year, I bought it used), my manual doesn't have any wiring diagrams, but the online PDF does have detailed wiring diagrams. I am not sure how much the wiring has changed even if the switch did.

H-M Supporter - Gold Member

From the pictures you posted the red actually looks more like yellow, but anyhow:
I think brown + black is the power pair and blue + yellow (red) is the motor pair. Or vise-versa.
I was going to post a possible hookup but it looks like it wouldn't have worked- I need to study the new manual a bit more
I shall return
Mark

H-M Supporter - Gold Member

From the pictures you posted the red actually looks more like yellow, but anyhow:
I think brown + black is the power pair and blue + yellow (red) is the motor pair. Or vise-versa.
I was going to post a possible hookup but it looks like it wouldn't have worked- I need to study the new manual a bit more
I shall return
Mark

Ok, so I hooked up my original wires like shown on this new diagram using the colors, , (not by the numbers on my original wires)
Plugged the power back in and flipped the drum switch forward, nothing, Reverse nothing. If I flip the drum switch in either direction and push the lathe ON button and hold it in, the chuck turns. If I let off the ON button everything stops

So I might have to get rid of the buttons on the "switch board" on the lathe's front,
Left is KILL button, I'd need that,
the next is ON ,
the next is Jog (which I never use any way)
and last, the light that tells ya the machine is on. (which I also don't need)

What would be my next step? I have seen this switch on all kinds of lathes, drill presses, mills, etc. I am sure it can be used on this . The micro rotary drum switch, which Grizzly used (for an undetermined amount of time) is basically a mini version of this Dayton drum switch

H-M Supporter - Gold Member

It should be possible to use the drum switch in place of the old plastic switch, but the circuit is a bit convoluted- I'm sure one of us can figure it out but it might take a couple days, hang in there
mark
Mutt: can you take a super close up pic of the old switch and show how it was connected? That would be a big help

The square end of the shaft that used to turn the motor on and off, had a plastic cam pressed onto the end of it. When ya raised or lowered the handle, it pushed the cam towards the switch, which would connect one set of contacts and the plastic cam would turn to close one or the other sets of contacts

H-M Supporter - Gold Member

It should be possible to use the drum switch in place of the old plastic switch, but the circuit is a bit convoluted- I'm sure one of us can figure it out but it might take a couple days, hang in there
mark
Mutt: can you take a super close up pic of the old switch and show how it was connected? That would be a big help

Unfortunately not. I didn't take a picture of the switch before I took the wires off today. That is one reason I was hoping someone had the owners manual from around 2000. It would show how those plastic switches were hooked up

H-M Supporter - Gold Member

I stand corrected on the caps. The data plate on the motor says " Dual Capacitor induction motor" I remember about 5 or more years ago, I think one of the caps went out. It must not have been the run cap as I've been running it for that long since. If I remember right, I just removed the old cap, taped off the wires to it and left it at that. Guess I better find out what mf that lower cap is and get another while this lathe is down

H-M Supporter - Gold Member

I jumped the red/black and the blue black and nothing happened. Then I tried the red black while holding the ON button. Nothing. Then the black blue holding the ON switch, nothing.

Then I turned the drum switch on to the forward position, jumped red black and held in the ON button and the motor turned CW.

If you hit the KILL button, then unlock the KILL button and flip the rotary switch in either direction nothing happens

If ya flip the rotary switch FORWARD and ya hold the ON button in, the motor will stay running until ya let go of the
ON button.

For a few times. I could flip the rotary switch in either direction and it would actually come on and stay on until I moved the rotary lever back to off. But when I kit the KILL button , I had to start all over again with this process.

IT has a mind of it's own right now. Some times it will go FORWARD on Forward, some times it will go CCW on forward ???? I don't see any kind of electornics on here. just junctions and contactors